HLSC-124 Chapter Notes - Chapter 4: Extracellular Polymeric Substance, Teichoic Acid, Lipoteichoic Acid
19 Sep 2016
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Hlst 124: lecture notes + supplemental textbook notes chapter 4. Tortora, g. , funke, b. , & case, c. (2016). Axial filament: only found in spirochetes, always in a bundle, found along the axil of a bacteria, within the outer sheath, forceful forward motion. Because of this force they are able to move to other tissues. Rotation of filaments causes movement of the outer sheath. Glycocalyx: capsule produced by the bacteria surrounds the bacteria. Firm attachment: the layer in this case is called a capsule. Loose attachment: the layer in this case is called a slime layer. Increases virulence (capacity to cause disease: ex. Used for attachment of cells in a biofilm to their environment and other cells: called extracellular polymeric substance, ex. Streptococcus mutants attaches to the teeth plaque formed tooth decay. Fimbriae or pili: look similar but very different, fimbriae. Used for attachment to other fimbriae or surfaces. Can be a few to hundreds on a cell: pili.
